21590374471 has 2 divisors, whose sum is σ = 21590374472. Its totient is φ = 21590374470.

The previous prime is 21590374457. The next prime is 21590374499. The reversal of 21590374471 is 17447309512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21590374471 - 2⁵ = 21590374439 is a prime.

It is a super-3 number, since 3×21590374471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21591374471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10795187235 + 10795187236.

It is an arithmetic number, because the mean of its divisors is an integer number (10795187236).

Almost surely, 2^21590374471 is an apocalyptic number.

21590374471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21590374471 is an equidigital number, since it uses as much as digits as its factorization.

21590374471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 21590374471 in words is "twenty-one billion, five hundred ninety million, three hundred seventy-four thousand, four hundred seventy-one".